Thread: JB Weld on Plastic?

The new tank is $18.95. I think that is likely the most cost-effective way to go, if my time is worth anything..........no, not a word, Andy.

Quote: Originally Posted by teacherman I have a 1994 Shindaiwa trimmer that has little use, but I believe leaks out of the gas tank at the seam. New fuel lines, etc and it was leaking quite a bit, and the gas line seemed to seal really well. Can I use JB to repair the tank? If so, how do I prep the plastic? Thanks. Between your pullers and JB weld, you are going to give Lakeside a heart attack. I would try to use an epoxy of some sort. I have...

The answer is "depends"... If the tank is Glass fiber reinforced nylon, then yes, but only if prepared correctly. Degrease inside and out. A good long wash in the dishwasher works great after you have the gas stink out. Dremmel out a V groove along the seam. Leave it rough and "fluffy". If you see any movement "melt" it together with a soldering iron. Set up your tank up so you can draw a vacuum via the fuel...

Sounds like Lakeside has a heck of a plan there. Now if you want to try and easier route. Years ago I had a trimmer I set down on something hot (I know, don't ask) and melted a hole right through the plastic tank. I just dump the gas, wiped the tank down with Xylene (paint solvent), poured Xylene in the tank and swished it around. After the prep was done, I just gobbed on some 100% silicone and let it dry. That deal lasted for a many...

If there is any stress on the leaking part I reinforce the patch with a form-fitted overlapping piece of perforated metal. Be sure to roughen the surface of the plastic and do not use J-B Quick, as it is attacked by gasoline or oil.

Hey teacherman, here's a thread for you to read. http://www.arboristsite.com/showthread.php?t=45431

lakeside is dead on on how to use the jb. when i restored my grille in my 69 charger whats how i fixed the cracks. i did it almost 4 years ago and the grill still looks like new. actually jb weld is great stuff i have never seen it not work on anything ive tried it on. just dont go and try to fix cylinder gouges with it lol............Mike